Machine for sharpening mower and reaper knives



' 2 Sheets-Sheet 1. J. M. OONNEL.

Machine for Sharpening Mower and Reaper Knives.-

No; 226,037 I Patented Mar. 30,1880.

lilli' e I. iiflunm% I: IIIIIIIIIIIIIIIIHHHIEELIILIM -PErEiS. FHOTO-UTNOGRAPHER, WASHINGTON. D. c.

2 Sheets-Shee't 2,.

' J. M. GONNEL.

Meehinefo'r Sharpening Mower and Reaper Knives.

No. 226,037 Patented Mar .'30, 1880- JAMES M. OONNEL, OF NEWARK, OHIO.

MACHINE FOR SHARPENING MOWERAND REAPER KNIVES.

SPECIFICATION forming part of Letters Patent No. 226,037, dated March 30, 1880.

Application filed February 5, 1880.

To all whom it may concern:

Be it known that I, JAMES M. OONNEL, a citizen of the United States, residing at Newark, in the county ofLickin g and State of Ohio, have invented certain new and useful Improvements in Mowing and Reaping Machine Knife-Sharpeners; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention is in the nature of improvements in machines for sharpening the knives or cutter-bars of mowing and reaping machines.

The invention consists in suspending or hanging a rotary grinding-wheel in a springsustained arm, which is attached to or connected with an adjustable or sliding divided standard, to permit the grinding-wheel to be moved along the whole edge of the knives from heel to point, as hereinafter more fully set forth.

In the drawings hereunto annexed, forming part of this specification, in the several figures of which like parts are correspondingly designated, Figure 1 is a side elevation of my device. Fig. 2 is atop-plan view thereof. Fig. 3 is a side view of the inner face of a modified form of mode of connecting the adjustable or sliding divided standard, and Fig. 4 is a vertical cross-section of the sameon the plane of line a: a: of Fig. 3. Figs. 5, 6, and 7 are, respectively, a side, end, and vertical sectional view of a modified form of mode of connecting the adjustable or sliding divided standard.

The parts of my mechanism, which may be of any ordinary approved construction, are a bed, A, to receive the parts; a head-block, B, to receive a pivoted rest, G, upon which the knife or cutter-bar D is placed, and a connected clamp, E, for securing said cutter-bar or knives to the said rest, the said rest being pivoted to permit the proper adjustment of the knives relative to the grinding-wheel.

F is a standard rotatable upon the bed upon a pivot, a. This standard is divided, and its upper portion, F, is adapted to be adjusted to slide or reciprocate upon thelower portion, and to this end the upper edge, b, of the lower section is elongated and chamfered, to form a bed to receive a reversely-chamfered portion, 0, of the upper section, substantially as shown in the cross-section of the modified form, Fig. 4, and resembling a tongue-and-groove joint. A slot, (1, is formed longitudinally in thelower section of the standard, and a flat-faced horizontal offset, 6, made thereon just below said slot.

The upper section, F, is provided with a down ward projection, f, the lower end of which is squared to rest flat upon the offset 0 of the lower section, and said upper section is securely connected to the lower section by a thumb-screw, rivet, or headed pin. g, extending through the slot (7. into the projectionf. The adjacent faces of the upper and lower sections are dressed even, so that they shall match and form smooth working-surfaces.

Instead of the slot and pin for securing the upper to the lower section, I may employ a rod or wire, h, on the lower section, lying in a groove, z, in the upper section, as shown in Figs. 3 and 4. In either case the wire or the pin should be provided with meanssuch as a nutto tighten the parts to compensate for wear, and so retain the two section in close contact and with true working-faces, in order to prevent wabbling or loo eness.

It will be understood that the contact of the lower edge of the projection f, in both forms, with the offset 6 materially aids in maintaining the trueness of the joint and steadying the movement of the upper section upon the lower.

The upper section, F, terminates in a boss, j, in which is arranged a shaft, h, which carries a drive-wheel, G, and forms a pivot or fulcrum for an arm. H. This arm, at its free end, extending to the knife-rest C, is provided with two pins,l m, the former carrying an emery, tanite, or other grinding wheel or stone, n, of suitable form, and a pinion or friction or other wheel, 0, and the latter (pin m) supporting a wheel, 19, which is in contact with the drive-wheel G and the wheel 0.

The wheels G1) 0 may be in frictional contact, or they may be toothed wheels, in order to transmit the rotary motion of the drivewheel to the grinding-wheel, and they may be constructed of the relative proportions herein indicated, to impart proper velocity to the grinding-wheel.

It will be understood from the foregoing that as the upper section, F, of the standard is reciprocated upon the lower section it carries with it the arm 'H and the connected wheels, so that the grinding wheel or stone may be moved along the edges of the knives to sharpen them.

The arm H is normally 6l6"tl(l by a spring, I, arranged parallel therewith, one end, 1', of which lies in a groove in the section F, as indicated in Fig. 2, and is secured to said section, the outer terminus of the groove forming a fulcrum for the spring, so that the spring may be said to bc fulcrumed upon section F. The said spring may be made with several vertical coils, s, encircling loosely a stud, t, projecting at a right angle from arm H and resting upon a horizontal extension, 0, of the chamt'ered portion 0 of the upper section of the divided standard. The other end, a, of this spring extends forward of the coil, so that its resiliency shall be in an upward direction in a vertical plane parallel to the arm to elevate said arm, and for this purpose said end u is made to engage with said arm, as by a stud, c, projecting at right angles from the side of the arm. The extension 0 of the upper section of the divided standard forms a hearing or resistance support for the spring, and insures a uniformly true action for such spring upon the arm. The tendency of the spring is to keep the arm in accurate working position, and its parallelism with said arm, the pivot of the arm, and the sliding upper section insures this, and also prevents the binding of the upper and lower sections of the standard.

The arm and its connected mechanism are actuated by a knob, 10, thereon. As the arm is depressed its stud t bears upon the spring I, and said spring resists by the bearing of its coils upon the extension 0. \Vhen the arm is 2 released the elevation of said arm which would follow from the action of the spring is limited by the stud t coming in contact with the coils of the spring.

Having described my invention, what I claim is 1. A divided standard having a lower slotted bed-piece or section and an upper sliding section provided with a projection, and a connectin g device extending through the slotted lower section into said projection, all combined substantially as shown.

2.. A divided standard composed of a lower section having a chamfered edge or bed and an offset and an upper section adapted to slide upon said lower section and having a chamfered portion and a downward projection with a squared end, in combination with means, substantially such as shown, to connect the two sections, asspecified.

3. In a cutter-bar grinding mechanism, an

arm carrying the grinding device, studs to thereon, a fulcrumed spring operating in 0011- nection with such studs, and a sliding supporting device, combined substantially as described.

a. In a cutter-bar grinding mechanism, an arm to carry the grinding device, having studs 2? 'u thereon, and a reciprocating support therefor, in combination. with a spring parallel with the plane of motion of said arm and fixed to the support and impinging upon the arm at its studs, substantially as and for the purpose specified.

5. In a cutter-bar grinding mechanism, an arm to carry the grinding device, its studs to, a support therefor, and a spring fixed to and impinging upon such support and engaging independently with the two studs of the arms, substantially as and for the purpose specified.

6. In a cutter-bar grinding mechanism, the combination of the arm, the grinding device thereon, a divided standard, and a spring for connecting the arm and the upper sliding portion of the standard, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES M. CONNEL.

Witnesses:

PAUL OoLLINs, EDsoN B. DENNIS. 

